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CDCE62005: 无法锁定,lock引脚输出为方波,输出的频率有偏差

Part Number: CDCE62005

输入时钟为40M,在使用EVM配置输出单通道100M时,实测的输出频率为103.7M,LOCK引脚输出为方波,请问这有可能是哪些方面会有问题,下图为lock引脚的输出波形,谢谢